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    Reanalyses of anomalous gravitational microlensing events in the ogle-iii early warning system database with combined data

    Access Status
    Fulltext not available
    Authors
    Jeong, J.
    Park, H.
    Han, C.
    Gould, A.
    Udalski, A.
    Szymanski, M.
    Pietrzynski, G.
    Soszynski, I.
    Poleski, R.
    Ulaczyk, K.
    Wyrzykowski
    Abe, F.
    Bennett, D.
    Bond, I.
    Botzler, C.
    Freeman, M.
    Fukui, A.
    Fukunaga, D.
    Itow, Y.
    Koshimoto, N.
    Masuda, K.
    Matsubara, Y.
    Muraki, Y.
    Namba, S.
    Ohnishi, K.
    Rattenbury, N.
    Saito, T.
    Sullivan, D.
    Sweatman, W.
    Sumi, T.
    Suzuki, D.
    Tristram, P.
    Tsurumi, N.
    Wada, K.
    Yamai, N.
    Yock, P.
    Yonehara, A.
    Albrow, M.
    Batista, V.
    Beaulieu, J.
    Caldwell, J.
    Cassan, A.
    Cole, A.
    Coutures, C.
    Dieters, S.
    Dominik, M.
    Prester, D.
    Donatowicz, J.
    Fouqué, P.
    Greenhill, J.
    Hoffman, M.
    Huber, M.
    Jorgensen, U.
    Kane, S.
    Kubas, D.
    Martin, R.
    Marquette, J.
    Menzies, J.
    Pitrou, C.
    Pollard, K.
    Sahu, K.
    Vinter, C.
    Wambsganss, J.
    Williams, Andrew
    Allen, W.
    Bolt, G.
    Choi, J.
    Christie, G.
    Depoy, D.
    Drummond, J.
    Gaudi, B.
    Hwang, K.
    Jung, Y.
    Lee, C.
    Mallia, F.
    Maoz, D.
    Maury, A.
    McCormick, J.
    Monard, L.
    Moorhouse, D.
    Natusch, T.
    Ofek, E.
    Park, B.
    Pogge, R.
    Santallo, R.
    Shin, I.
    Thornley, G.
    Yee, J.
    Bramich, D.
    Burgdorf, M.
    Horne, K.
    Hundertmark, M.
    Kains, N.
    Snodgrass, C.
    Steele, I.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Jeong, J. and Park, H. and Han, C. and Gould, A. and Udalski, A. and Szymanski, M. and Pietrzynski, G. et al. 2015. Reanalyses of anomalous gravitational microlensing events in the ogle-iii early warning system database with combined data. Astrophysical Journal. 804 (1).
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/804/1/38
    ISSN
    0004-637X
    School
    Curtin Institute of Radio Astronomy (Engineering)
    URI
    http://hdl.handle.net/20.500.11937/72061
    Collection
    • Curtin Research Publications
    Abstract

    © 2015. The American Astronomical Society. All rights reserved. We reanalyze microlensing events in the published list of anomalous events that were observed from the Optical Gravitational Lensing Experiment (OGLE) lensing survey conducted during the 2004-2008 period. In order to check the existence of possible degenerate solutions and extract extra information, we conduct analyses based on combined data from other survey and follow-up observation and consider higher-order effects. Among the analyzed events, we present analyses of eight events for which either new solutions are identified or additional information is obtained. We find that the previous binary-source interpretations of five events are better interpreted by binary-lens models. These events include OGLE-2006-BLG-238, OGLE-2007-BLG-159, OGLE-2007-BLG-491, OGLE-2008-BLG-143, and OGLE-2008-BLG-210. With additional data covering caustic crossings, we detect finite-source effects for six events including OGLE-2006-BLG-215, OGLE-2006-BLG-238, OGLE-2006-BLG-450, OGLE-2008-BLG-143, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. Among them, we are able to measure the Einstein radii of three events for which multi-band data are available. These events are OGLE-2006-BLG-238, OGLE-2008-BLG-210, and OGLE-2008-BLG-513. For OGLE-2008-BLG-143, we detect higher-order effects induced by the changes of the observer's position caused by the orbital motion of the Earth around the Sun. In addition, we present degenerate solutions resulting from the known close/wide or ecliptic degeneracy. Finally, we note that the masses of the binary companions of the lenses of OGLE-2006-BLG-450 and OGLE-2008-BLG-210 are in the brown-dwarf regime.

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